Improvement in tools for turning emery-wheels



1. H. GRAY.

Tools for Turning Emery-Wheels.

N.(),I54, 668, Patented Sept.1,1874.

WE GRAPHIC CQPHUTO'UTFLSQIKJ PARK PLACE/RX.

UNITED STATES PATENT OFFICE.

JAMES H. GRAY, OF WORCESTER, MASSACHUSETTS.

lMPROVEME NTlN TOOLS FOR TURNING EMERV-WHEELS.

Specification forming part of Letters Patent No. 154,668, datedSeptember 1,1874; application filed August 6, 1874.

To all whom it may concern Be it known that 1, JAMES H. GRAY, of thecity and county of Worcester and State of Massachusetts, have invented anew and Improved Tool for Turning Emery-Wheels; and I do hereby declarethe following to be a full and exact description of the same, referencebeing had to the accompanying drawin gs forming part of thisspecification, in which Figure 1 represents a side elevation of myinvention, and Fig. 2 a longitudinal vertical section of the same.

Similar letters of reference in the accompanying drawings denote thesame parts.

My invention relates to improvements in tools for facing or truingemery-wheels; and consists in the employment of a thin strip of iron,steel, or other equivalent metalheld in an opening in a suitable socketor holder and adjusted by a screw or other equivalent mechanism, andadapted to be applied to the toolposts of turning-lathes in common use,affordin g a simple and efficient device for the abovenamed purpose.

In the accompanying drawing, A is the socket-piece of my improvedtool-holder, provided with an aperture, 13, for the reception of a thinstrip, 0, of iron, steel, or other eq uivalent 1n etal. The centralportion of the socketpiece A' is provided with a screw-threaded orificeextending from its rear end to the aperture B, in which operates ascrew-threaded bolt, D, provided with a handle, E. By this constructionit will be seen that by operating the screw-threaded bolt the metalplate (3 can be adjusted horizontally farther from or nearer to theemery-wheel it is desired to true. F is the vertical arm of thetool-holder, adapted to be applied. to the tool-posts of turnin g-lathesin common use.

The operation of my invention is as follows: The vertical arm F issecured in the tool-post of a turning engine, the thin strip of metalbeing inserted in the aperture, and by the well-known means the end ofthe metal strip is brought in contact with the emery-wheel to beoperated upon and moved across the face or side, removing all projectinginequalities rapidly, the cutting-edge of said tool being presented tothe emery-wheel parallel to the plane of its rotation instead of atright angles thereto, as is usually the case in dress- I inggrindstones. In practice I find that the strip should project slightlyfrom the aperture to prevent wear of the tool-holder, the strip beingretained and adjusted in position by the screw. As the cutting-edgewears away the strip is moved forward by the screw, and as the Wheel isturned smaller or thinner its relative position with the aperture ismaintained by the devices ordinarily employed on turning-engines. Thecutting device having a uniform thickness, and the emery-wheelcontinually grinding the edge of the cutter sharp, the process ofturning is expedited by the means which retard the process by the usualdevices employed, making the operation, in comparison with the tediousprocess now in vogue, brief.

As the diamond held in a tool made for thepurpose,requiringcarefulhandling,slowspeed, and very light pressure, isthe only method now in use for truing emery-wheels, the advantages ofthe means presented are readily seen.

I am aware that strips of metal capable of vertical adjustment in theirsocket or holder have heretofore been employed in mill-picks; and I amalso aware that metallic disks situated in an adjustable frame have beenemployed in facing or truing grindst-ones; and I therefore lay no claimto such devices, neither of which could be applied to the toolpost of atruing-engine to face emery-wheels.

I claim as my invention- 1. A tool for truing emery-wheels, consistingof a thin strip .of metal, 0, constructed to be applied to theemery-wheel, substantially as described.

2. A thin strip of metal, supported and adjusted in a tool-holder,secured to the toolpost of a turning engine, for the purpose of turningemery-wheels, substantially as described.

3. The combination of the tool-holder A F, provided with the aperture Band screw D, and strip of metal 0, substantially as described, and forthe purpose set forth.

JAMES H.. GRAY.

IVitnesses MosEs HOBART, Josnrn WHITAKER.

